1# SPDX-License-Identifier: GPL-2.0+
2#
3# Copyright (c) 2011 The Chromium OS Authors.
4
5# This Makefile builds the internal U-Boot fdt if CONFIG_OF_CONTROL is
6# enabled. See doc/README.fdt-control for more details.
7
8DEVICE_TREE ?= $(CONFIG_DEFAULT_DEVICE_TREE:"%"=%)
9ifeq ($(DEVICE_TREE),)
10DEVICE_TREE := unset
11endif
12
13ifeq ($(CONFIG_OF_UPSTREAM),y)
14ifeq ($(CONFIG_ARM64),y)
15dt_dir := dts/upstream/src/arm64
16else
17dt_dir := dts/upstream/src/$(ARCH)
18endif
19else
20dt_dir := arch/$(ARCH)/dts
21endif
22
23ifneq ($(CONFIG_OF_UPSTREAM_INCLUDE_LOCAL_FALLBACK_DTBOS),)
24local_dtbos := local-dtbos
25else
26local_dtbos :=
27endif
28
29ifneq ($(EXT_DTB),)
30DTB := $(EXT_DTB)
31else
32DTB := $(dt_dir)/$(DEVICE_TREE).dtb
33endif
34
35$(obj)/dt-$(SPL_NAME).dtb: dts/dt.dtb $(objtree)/tools/fdtgrep FORCE
36	mkdir -p $(dir $@)
37	$(call if_changed,fdtgrep)
38
39ifeq ($(CONFIG_OF_DTB_PROPS_REMOVE),y)
40$(obj)/dt.dtb: $(DTB) $(objtree)/tools/fdtgrep FORCE
41	$(call if_changed,fdt_rm_props)
42else
43$(obj)/dt.dtb: $(DTB) FORCE
44	$(call if_changed,shipped)
45endif
46
47targets += dt.dtb
48
49$(DTB): arch-dtbs $(local_dtbos)
50	$(Q)test -e $@ || (						\
51	echo >&2;							\
52	echo >&2 "Device Tree Source ($@) is not correctly specified.";	\
53	echo >&2 "Please define 'CONFIG_DEFAULT_DEVICE_TREE'";		\
54	echo >&2 "or build with 'DEVICE_TREE=<device_tree>' argument";	\
55	echo >&2;							\
56	/bin/false)
57
58PHONY += arch-dtbs
59arch-dtbs:
60	$(Q)$(MAKE) $(build)=$(dt_dir) dtbs
61
62ifneq ($(CONFIG_OF_UPSTREAM_INCLUDE_LOCAL_FALLBACK_DTBOS),)
63PHONY += local-dtbos
64local-dtbos:
65	$(Q)$(MAKE) $(build)=arch/$(ARCH)/dts dtbos
66endif
67
68ifeq ($(CONFIG_XPL_BUILD),y)
69obj-$(CONFIG_OF_EMBED) := dt-spl.dtb.o
70# support "out-of-tree" build for dtb-spl
71$(obj)/dt-spl.dtb.o: $(obj)/dt-spl.dtb.S FORCE
72	$(call if_changed_dep,as_o_S)
73else
74obj-$(CONFIG_OF_EMBED) := dt.dtb.o
75endif
76
77# Target for U-Boot proper
78dtbs: $(obj)/dt.dtb
79	@:
80
81# Target for SPL/TPL
82spl_dtbs: $(obj)/dt-$(SPL_NAME).dtb
83	@:
84
85clean-files := dt.dtb.S
86
87# Let clean descend into dts directories
88subdir- += ../arch/arc/dts ../arch/arm/dts ../arch/m68k/dts ../arch/microblaze/dts	\
89	   ../arch/mips/dts ../arch/nios2/dts ../arch/powerpc/dts ../arch/riscv/dts	\
90	   ../arch/sandbox/dts ../arch/sh/dts ../arch/x86/dts ../arch/xtensa/dts	\
91	   ./upstream/src/arm64 ./upstream/src/$(ARCH)
92